- Jil sander's new cat-heel square-toe short boots have a clean and neat layout design without any complicated decorations. They have an excellent vintage feel. They are pure and minimalist in a neat and poetic way. They are super versatile and not easy to dress up. Upper: Calfskin lining: Sheepskin Heel height: 4.5cm Sole: Genuine leather imported from Italy Outsole Size: 35-39 (40 is custom-made and cannot be returned or exchanged),